public class test {
    public static void main(String[] args) {
        Integer i = new Integer(127);
        Integer j = new Integer(127);
        System.out.println(i == j);
        Integer i5 = 127;//底层 Integer.valueOf(127);
        Integer i6 = 127;//-128~127
        System.out.println(i5 == i6); //T
    }
}
